A man who jumped off a cliff into the Potomac near Great Falls on Wednesday and did not emerge has been identified as Marco Reyes-Sanchez, 21, of Reston.

Reyes-Sanchez is presumed drowned, Montgomery County police spokesman Paul Starks and fire and rescue spokesman Pete Piringer told the Washington Post on Thursday. Crews will continue to search the river for his body Friday morning, Montgomery County officials said.

Reyes-Sanchez and another man went into the water on Wednesday from the Virginia side, near Sandy Landing, officials said. Marco Reyes-Sanchez never emerged.

The search began Wednesday afternoon. About three hours later, workers suspended their search for the night and then resumed Thursday.

Fairfax County Fire Rescue boats aided in the search on Wednesday. The National Park Service provided a helicopter to search from the air, a spokeswoman said. Searchers on horseback joined the search for Reyes-Sanches on Thursday.

Photo: Search efforts on and near the Potomac/Courtesy Montgomery County Fire Rescue